package org.best.example; import java.util.Set; import java.util.HashSet; public class CheckDuplicate { public static void main(String args[]) { String [] sValue = new String[]{"a","b","c","d","","","e","a"}; if(checkDuplicated_withNormal(sValue)) System.out.println("Check Normal : Value duplicated! \n"); if(checkDuplicated_withSet(sValue)) System.out.println("Check Set : Value duplicated! \n"); } //check duplicated value private static boolean checkDuplicated_withNormal(String[] sValueTemp) { for (int i = 0; i < sValueTemp.length; i++) { String sValueToCheck = sValueTemp[i]; if(sValueToCheck==null || sValueToCheck.equals(""))
continue; //empty ignore for (int j = 0; j < sValueTemp.length; j++) { if(i==j)continue; //same line ignore String sValueToCompare = sValueTemp[j]; if (sValueToCheck.equals(sValueToCompare)){ return true; } } } return false; } //check duplicated value private static boolean checkDuplicated_withSet(String[] sValueTemp) { Set<String> sValueSet = new HashSet<String>(); for(String tempValueSet : sValueTemp) { if (sValueSet.contains(tempValueSet)) return true; else if(!tempValueSet.equals("")) sValueSet.add(tempValueSet); } return false; } }
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